He said that the tariff is $1 per barrel of oil, adding that empty tankers can pass freely. “Once the email arrives and Iran completes its assessment, vessels are given a few seconds to pay in Bitcoin, ensuring they can’t be traced or confiscated due to sanctions,” Hosseini added.
This one? United Nations Convention on the Law of the Sea (UNCLOS)?
As far as I found out neither the US, nor Iran ratified this.
If you want to argue with law you need to have a law which all states involved follow.